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低阶煤与生物质混合低温共热解特性分析及对产物组成的影响

王俊丽 赵强 郝晓刚 黄伟 赵建国

王俊丽, 赵强, 郝晓刚, 黄伟, 赵建国. 低阶煤与生物质混合低温共热解特性分析及对产物组成的影响[J]. 燃料化学学报(中英文), 2021, 49(1): 37-46. doi: 10.19906/j.cnki.JFCT.2021003
引用本文: 王俊丽, 赵强, 郝晓刚, 黄伟, 赵建国. 低阶煤与生物质混合低温共热解特性分析及对产物组成的影响[J]. 燃料化学学报(中英文), 2021, 49(1): 37-46. doi: 10.19906/j.cnki.JFCT.2021003
WANG Jun-li, ZHAO Qiang, HAO Xiao-gang, HUANG Wei, ZHAO Jian-guo. Low temperature co-pyrolysis of low rank coal with biomass and its influence on pyrolysis-derived products[J]. Journal of Fuel Chemistry and Technology, 2021, 49(1): 37-46. doi: 10.19906/j.cnki.JFCT.2021003
Citation: WANG Jun-li, ZHAO Qiang, HAO Xiao-gang, HUANG Wei, ZHAO Jian-guo. Low temperature co-pyrolysis of low rank coal with biomass and its influence on pyrolysis-derived products[J]. Journal of Fuel Chemistry and Technology, 2021, 49(1): 37-46. doi: 10.19906/j.cnki.JFCT.2021003

低阶煤与生物质混合低温共热解特性分析及对产物组成的影响

doi: 10.19906/j.cnki.JFCT.2021003
基金项目: 国家自然科学基金青年科学基金(21908135),山西省面上青年基金(201901D211435),山西省留学回国人员科技活动择优资助项目(2019-20)和山西省高等学校科技创新项目(201802096)资助
详细信息
    通讯作者:

    E-mail: wangjunlitylg@126.com

    xghao@tyut.edu.cn

    jgzhaoshi@163.com

  • 中图分类号: TQ536

Low temperature co-pyrolysis of low rank coal with biomass and its influence on pyrolysis-derived products

Funds: The project was supported by the National Natural Science Foundation of China (21908135), Shanxi Province Science Foundation for Youths (201901D211435), Shanxi Province Foundation for Returness (2019-20) and Science and Technology Innovation Project for Colleges and Universities in Shanxi Province (201802096)
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  • 摘要: 通过非等温热重实验和固定床实验对两种低阶煤(内蒙兴和煤、小龙潭煤)和三种比较常见的生物质(秸秆、向日葵杆、苹果树枝)的低温共热解特性进行了研究。结果表明,煤与生物质共热解是否存在协同效应与生物质种类及混合比例密切相关。对于内蒙兴和煤,秸秆和向日葵杆的加入对于共热解过程影响不显著,与苹果树枝共热解效果明显大于前两种生物质,且内蒙兴和煤与苹果树枝混合比例为2∶1时,共热解协同效果最为明显。通过固定床实验对共热解产物的研究进一步证明了苹果树枝与内蒙兴和煤共热解时协同效应的存在。焦油组分分析结果表明,焦油中含氧化合物组分含量升高,烃类含量降低,即共热解提高了焦油产率,但不能改善焦油品质。
  • 图  1  煤和/或生物质热解固定床装置示意图

    Figure  1  The lab equipment used for coal/biomass pyrolysis

    图  2  110−900 °C生物质和煤单独热解时TG-DTG曲线

    Figure  2  TG and DTG curves of samples at temperature range of 110−900 °C

    图  3  混合样品的热重曲线:((a),(b)和(c))内蒙兴和煤与不同生物质以不同比例掺杂;((d),(e)和(f))小龙潭煤与不同生物质以不同比例掺杂

    Figure  3  TG curves of mixed samples: ((a),(b) and (c)) NMXH with different biomasses; ((d),(e) and (f)) XLT with different biomasses

    图  4  不同温度下内蒙兴和煤热解

    Figure  4  Results of NMXH coal pyrolysis at different temperatures

    (a): product yield; (b): components in pyrolysis gas; (c) and (d): components in pyrolysis tar of coal pyrolysis

    图  5  内蒙兴和煤与苹果树枝共热解产物分布实验值与理论计算值对比图

    Figure  5  Comparation between experimental results and theoretical calculation values of the product distribution

    图  6  内蒙兴和煤与苹果树枝共热解气体组成实验值与理论计算值对比图

    Figure  6  Comparation between experimental results and theoretical calculation values of gas composition

    图  7  热解焦油组分分布(a)NMXH和PGSZ单独热解;(b)NMXH和PGSZ按不同比例混合计算值与实际值对比

    Figure  7  Component distribution of pyrolysis tar (a) coal and PGSZ; (b) comparation between experimental results and theoretical calculation values of tar composition at different molar ratios of NMXH to PGSZ

    表  1  实验使用三种生物质的工业分析和元素分析

    Table  1  Proximate and ultimate analyses of the biomass samples

    Proximate analysis w/%Ultimate analysis w/%
    MadAadVadFCadCadHadOadNadSad
    Straw 6.71 14.36 63.48 15.45 38.9 5.49 37.49 0.56 0.11
    Sunflower 6.77 0.83 74.79 17.61 47.54 6.06 42.27 0.05 0.03
    Apple tree branches 6.20 1.13 78.59 14.08 45.99 6.33 44.91 0.11 0.00
    ad: air-dried basis
    下载: 导出CSV

    表  2  实验使用煤样的工业分析、元素分析和灰成分分析

    Table  2  Proximate, ultimate and ash content analyses of the coal samples

    Proximate analysis w/%Ultimate analysis w/% b
    MadaAdbVdafcFCdCdHdOdNdSd
    NMXH11.4311.9046.5347.1060.914.0118.110.914.15
    XLT11.1610.5751.2843.5760.994.2821.431.631.10
    Ash composition analysis w/%
    NMXHXLTNMXHXLTNMXHXLT
    SiO221.7519.43MgO3.833.93K2O0.940.58
    Al2O315.6010.53TiO20.370.90Na2O0.520.04
    CaO14.5431.49SO326.6018.74Mn3O4
    Fe2O315.629.40P2O50.600.28MnO20.132
    a ad: air-dried basis; b d: dry basis; c daf: dry ash-free basis
    下载: 导出CSV

    表  3  实验原料最大失重率相关温度

    Table  3  Temperatures of maxmiun loss rate in various material pyrolysis

    SampleNMXHXLTStrawSunflowerApple tree branches
    Temperature of maximum weight loss ratio tmax/℃415.00407.20321.46360.53361.27
    Final temperature of rapid weight loss stage tf/℃607.40572.26363.77380.82380.14
    下载: 导出CSV
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  • 收稿日期:  2020-09-09
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